JP2002242578A - Leader storage device for pile driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem such that an inclination has to be made gentle by making a climbing plate longer because there is a fear that an end of a lower leader, a lower guide or an auger drive unit can interfere with the climbing plate and ground during loading to/unloading from a trailer by making the end of the lower leader, the lower guide or the auger drive unit get close to the ground though an overall height during transport is reduced when the lower leader is folded to be suspended ahead of a base machine during the transport. SOLUTION: Constitutionally, a connecting shaft 25 between an upper leader 9b and the lower leader 9a is located below a supporting shaft 11 of a leader 9 during operations, and a front lower part of a leader support 7 and the lower leader 9a are coupled together by a link 43 during the transport.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can adjust the inclination of the reader in the front-rear and left-right directions at the time of work, and can store the upper reader almost horizontally above the base machine at the time of transportation. The present invention relates to a leader storage device of a pile driver capable of holding a lower leader hanging down in front of a base machine in an inclined posture in which a tip is lifted.

[0002]

2. Description of the Related Art In a conventional pile driver, Japanese Patent Publication No. 5-26111 discloses a device for adjusting the inclination of the leader in the front-rear and left-right directions at the time of work and for storing the leader almost horizontally above the base machine during transportation. As described in, the leader support is supported by the tilting cylinder at the front end of the main body frame of the base machine so as to be tiltable in the left and right direction, and is supported at the front upper part of the leader support so as to be tiltable in the front and rear direction. It consists of a leader supported by a shaft, and the leader and the rear part of the reader support are connected by an up / down cylinder. Adjustment of the inclination of the leader in the front-back direction is performed by expansion and contraction of the up / down cylinder. It is known that the adjustment is performed by expanding and contracting the tilting cylinder, and the storage of the leader is performed by contracting the undulating cylinder.

However, if the reader is stored horizontally in a straight line, the auger drive unit and the lower guide of the auger protrude above the base machine, increasing the overall height during transportation. Therefore, the reader can be divided into upper and lower parts and bent. It is preferable that only the upper reader is stored in a horizontal position above the base machine during transportation, and the lower reader holding the auger drive device is hung down in front of the base machine, but in this manner, the reader is bent. Requires a large hydraulic cylinder that can raise and lower the lower leader and auger drive.

[0004]

When the leader is bent in this manner, the overall height during transportation is reduced, but the tip of the lower leader, the lower guide, or the auger drive hanging down in front of the base machine approaches the ground. By doing so, it may interfere with the uphill board or the ground when loading or unloading the trailer.Therefore, the uphill board must be lengthened to make the slope gentle, and the hydraulic cylinder for bending the leader There was a problem that the total weight of the tires increased.

[0005]

According to the present invention, as a means for solving such a problem, the connecting shaft between the upper reader and the lower reader is located below the supporting shaft of the reader at the time of work, and the reader support is provided at the time of transportation. And the lower leader is connected by a link.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. In the pile driving machine 1, a leader support 7 is provided at a front end of a main body frame 5 of a base machine 3, and a leader 9 is supported on a front upper portion of the leader support 7 by a support shaft 11, and a rear portion of the leader support 7 and a leader 9 are provided. An up-and-down cylinder 10 is interposed therebetween.

The reader support 7 has a bracket 13 projecting from one side of the frame main body 5 and a bracket 15 projecting from one side of the reader support 7 connected by a shaft 17. A tilting cylinder 23 is interposed between the bracket 19 protruding on the side and the bracket 21 protruding on the other side of the reader support 7.

As shown in FIG. 4, the reader 9 has a lower reader 9a below the support shaft 11 with the reader support 7.
And an upper reader 9b, which is connected by a connecting shaft 25 so as to be bendable, and is connected straight by tightening a bolt 26 passing through flanges 27, 27 to a nut 28.

The reader 9 has a guide pipe 2 on its front surface.
9 and the rack 31 are integrally formed, and the auger driving device 3
The guide gib 3 is engaged with the guide pipe 29 and moves up and down along the leader 9 by rotation of the pinion 37 meshing with the rack 31.

A lower guide 39 of the auger a is fixed to a lower end of the reader 9.

The above is a known pile driver 1, in which the leader support 7 is expanded or contracted by the tilting cylinder 23 during operation.
The auger a is adjusted in the left-right direction by tilting the leader 9 supported on the shaft 17 to the left and right with the shaft 17 as a fulcrum.
1 to adjust the auger a in the fore-and-aft direction by tilting it back and forth, digging the ground while rotating the auger a by the auger driving device 33, and then pushing the pile in. When transporting, as shown in FIG. 3 and 5, the upper leader 9b is retracted in a substantially horizontal position above the base machine 3 by contracting the undulating cylinder 10, as shown in FIGS. The reader 9 a hangs forward of the base machine 3 while holding the auger driving device 33.

However, in the present embodiment, a hole 41 is formed in the lower front part of the reader support 7, and the lower reader 9 a obliquely below the hole 41 has a gap between the support shaft 11 and the connection shaft 25. A longer link 43 is supported by a connecting pin 45, and the upper end of the link 43 is fixed to the lower reader 9a by a detachable connecting pin 47 as shown by a solid line in FIG.
As shown by the chain line, before the upper leader 9b is lowered, the connecting pin 47 is pulled out and the hole above the link 43 is inserted into the leader support 7.
And the connecting pin 47 is inserted.

In this case, the reader support 7 of the reader 9
The support shaft 11, the connecting shaft 25 between the lower reader 9a and the upper reader 9b, the connecting pin 47, and the connecting pin 45 form a four-bar rotating chain with the reader support 7 as a fixed node. As shown in FIG.
Is pivoted upward with the support shaft 11 as a fulcrum, the lower leader 9a is lifted and the link 43 is raised, so that the lower leader 9a is It turns up.

Therefore, even when the slope is not so gentle when loading or unloading the trailer, interference of the lower leader 9a, the lower guide 39 or the auger driving device 33 with the slope or the ground can be avoided. .

In the above-described embodiment, the link 43 is fixed to the lower reader 9a so as not to interfere with the work. However, as shown in FIG. Alternatively, the hole of the link 43 may be adjusted to pass through the connecting pin 47 so as to be fixed.

The lifting height and the rotation angle of the lower leader 9a can be adjusted by the length of the link 43.

The hoisting cylinder 10 and the tilting cylinder 23 may be hydraulic cylinders or electric cylinders.

[0018]

According to the present invention, the connecting shaft of the upper reader and the lower reader is located below the supporting shaft of the reader during operation, and the front lower portion of the reader support and the lower reader are connected by a link during transportation. Therefore, when the upper leader is moved backward during transportation, the lower leader is lifted and the link is lifted, so that the lower leader pivots upward about the connecting shaft, whereby the lower reader is moved as a whole. Being lifted,
The lower guide is in a raised position, which facilitates loading, unloading, and self-propelling on the trailer.

Further, since the link is connected to the reader support, the link can be easily connected even when the left and right angles of the reader are adjusted by tilting the reader support.

Further, at the time of work, the link is fixed to the reader or the reader support with the connecting pin, so that the work is not hindered, there is no risk of loss, and the mounting work is easily performed.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a working state of a pile driver according to the present invention.

FIG. 2 is an enlarged front view thereof.

FIG. 3 is a side view of a transportation state.

FIG. 4 is an enlarged side view of a main part in a working state.

FIG. 5 is an enlarged side view of a main part in the same working state.

FIG. 6 is an enlarged side view of a main part in a transport state.

[Explanation of symbols]

 1: Piling machine 3: Base machine 5: Body frame 7: Leader support 9: Leader 9a: Lower leader 9b: Upper reader 10: Cylinder for undulation 11: Support shaft 23: Cylinder for tilt 25: Connection shaft 43: Link

Claims (2)

[Claims] 1. A reader support supported at a front end of a main body frame of a base machine by a tilting cylinder so as to be tiltable in the left-right direction, and an upper reader is connected to a lower reader so as to be bent rearward. A leader supported by a support shaft so as to be tiltable in the front-rear direction at the front upper part of the reader support in the upper leader,
In the leader storage device of a pile driver in which the upper leader and the rear part of the leader support are connected by an up / down cylinder, a connection shaft between the upper leader and the lower leader is located below the support shaft during operation. And a leader storage device for a pile driver, wherein a lower front part of the leader support and the lower leader are connected by a link during transportation. 2. The leader storage device of a pile driver according to claim 1, wherein the link can be fixed to the leader or the leader support using a connecting pin during operation.